Rotary meter



2 Sheets-Sheet 1.

(No Model.)

B. PITTS 8v J. I. WILSON.

ROTARY METER.

Nb. 281,257. Patented July 1'7, 1883.

, Jul 671x602? Wtnasey HoMoaeLf T ZSheets-SheetZ. B. PITTS & J; F. WILSON.

ROTARY METER. No. 281,257. Patented July 1'7, 1883.

Illa}! ,illllll 7 UNITED STATES I PATENT Fries.

ROTARY M ETER.

SPECIFICATION forming part of Letters Patent No. 281,257, dated July 17, 1888.

Application filed December 4, 1585.. (N0 model.)

To all whom it mayy concern.-

.Be it known that we, BENAIAH Frr'rs and Janus F. Wrnson, both of Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Rotary Meters; and we declare the following to be a description of our said invention sufliciently full, clear, and exact to enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

Our present invention relates to certain improvements in the construction of rotary meters of the class described in Letters Patent No. 267 ,174, granted to us November 7, 1882.

The principal features of our present invention are the arrangement of the passages for the inlet and outlet of the fluid in such manner as to provide against unequal or excessive pressure tending to force the piston toward one end of the ease and the consequent strain and wear upon the working parts and bearingsurfaces; also, to provide means for convenient adjustment of the working parts to give freedom of action; also, to render the mechanism capable of being readily duplicated.

In the accompanying drawings, which form a part of this specification, Figure l represents avertical sectional viewof ourimproved meter at the position of line m m. Fig. 2 is a horizontal sectional view at the line y y. Fig. 3 is a plan view, with the top plate removed,

showing the bearing, s pider, intermediate gearing, and top end plate on a somewhat larger scale. Fig. 4 is a plan view of the upper piston-carrier plate. Fig. 5 is a vertical section of same at line 2 z. Fig. 6 is a plan view of the lower piston-carrier plate. Fig. 7 is avertical. section of the same at line 2; '0. Fig. 8 is a vertical section at line 10 w.

The body of the meter consists of a cylinder or casing, A, to one of which is bolted or 0therwise fastened a hollow cap, B. To the opposite end is secured the base 0, which is furnished with suitable nipples or bosses, a c, for connection with the supply and delivery pipes. The inner surface of the cylinder or casing A has a series of projecting cogs or ribs, 1) b, of

any suitable form, which engage or mesh with the projecting teeth or blades (1 of the piston D, which latter is revoluble about an axis, 6, supported by the carrier-plates or heads H and I, and located eccentric to that of main cylinder A. The piston D, while revolving about its axis 0, at the same time has a rotary motion about the main central. axis of the cylinder by the rotation of the plates H and I. The pinion or piston D and the casing A are so proportioned that their teeth or projections fit closely together as the one rolls upon the other, in the manner of toothed wheels, as set forth in opr Patent No. 267,174, above referred to. This space between the extremities of the piston-teeth and cylinder-cogs at the opposite side from their line of meshing is closed by a curved bulk-head or mouth-piece, E, which, with the pinion D, divides the space within the cylinder into the two chambers, F and G, one of which communicates with the supply, and from the other leads the delivery-channels. The piston D and bulk-head E prevent the flow of fluid from one to the other of said chambers, except such as is passed between the teeth or projections 11 by movement of theme'chanism. The outer and inner surfaces of the bulkhead E correspond to the curves of ,motion at the extremities of the teeth of the casing A and pinion D, respectively, so that they form close gates or joints as the parts move past each other, the action of the parts D E being substantially similar to that described in our former Letters Patent.

Guarding the ends of the piston are the head-disks or circular plates H I, which plates are connected together by the bulk-head E and shaft or bolt 8, which forms the axial bearing of the piston D. The plates H and I are provided with axial bearings or pivotstuds H and I, centrally located with reference to the cylinder A. Supporting the hearing H and its associated parts is an annular plate or spider frame, K, recessed within the ends of the cylinder, which annular plate also serves, with the head or disk H, to separate the chambers F and G from the chamber B in the hollow cap B. The inner rim of the annular plate K forms a close ring-joint with the outer rim of the disk H.

At one side of the plate H suitable spaces or openings, m, are provided for the admission of fluid to the receiving-chamber F. The

with the inlet and outlet passages a and a, andalso with the receiving-chamber F, through the opening m, and with the delivery-chamber G through the openings n in the plate and a in the mouth-piece E, as shown. Connection is also made from the inlet a with the receiving-chamber F by a passage, m atone side of the casing A, which admits the fluid into the chamber B in the hollow cap B, whence it can'flow through the opening m. The plate I has openings m, for the ingress of fluid from the annular chamber S to the receiving-chamber F, and passages n, for the egress of the fluid from the discharging-chamber G to the annular channel Z, as hereinafter explained. The outerrin1 surfaces of plate I are made to conform to the circle of the recesses at 0 and h in the base 0, with which a close joint is formed.

In order to form a closer joint and prevent leakage between the moving surfaces at h and 0, grooves may be cut around one or both of the bearing parts, as indicated, thus forming a packing by means of the fluid which will fill them.

An adjustable step or set-screw, T, and cheeknut t may be used for supporting the bearing or stud I, and forming an end support for the parts, as shown. Thus screw Tserves to ad: just the piston D and the mechanism connected therewith to its normal position when, by reason of wear on the step or for any other reason, it becomes vertically displaced. For a similar purpose the bearing H is provided with a yoke, P, which may be secured by adjusting-screws j to the spider K; or an adjustable screw-stud, J arranged in the cap B, may be employed for the purpose of regulating the position of the parts.

In the operation of the meter, the fluid enters through the passages a m to the chamber B, thence through the opening m to the chamber F, also at the same time through the passage s and opening m to the said chamber F, thus suspending or balancing the piston D, with its plates H and I and bulk-head E, between the two entering streams or current pressures, and thereby relieving the step T and yoke P from the weight and pressure of the moving parts. The pressure of the fluid acts upon the blades of the pinion or piston D at the position z to force it past the partition E, transferring with it the fluid contained between the blades d (Z from the chainbcr F to the chamber G, from whence it passes through the opening a in plate I, and through the opening a of mouthpiece E, into the passage Z and out at passage a. If desired or found advantageous, the meter may be operof the outlet-stream instead of the inlet-current. By the action of the fluid the piston D is caused to roll round the internally-geared cylinder, thereby effecting the revolution of the plates H and I and the bulk-head E,which maintain their relative position to each other, and the movement of the plate-journal H is transmitted through the intermediate gearing, W W, and the crank V to the register mechanism X, which, by being properly speeded to correspond with the delivery of the piston, will indicate the number of gallons or cubic feet discharged, as may be required.

What we claim as of our invention, and desire to secure by Letters Patent, is-

1. In a meter mechanism consisting of an internally-toothed casing, an eccentrically-arranged intermeshing piston, and intermediate bulk-head or mouth-piece, suitable conduits or passages adapted for admitting fluid to the piston-chamber at both ends of the revolving piston, for the purpose set forth.

2. -The base-piece provided with inlet and outlet passages a a, and having annular chambers s and Z, in combination with the inter nally-toothed cylinder A, intermeshing toothed piston D, bulk-head E, and end plates or pivotcarriers, H I, as set forth.

3. The combination, with the internallytoothed cylinder A, provided with aside conduit, m the intermeshing toothed piston D, bulk-head E, and end plates or disks, H I, of

the hollow cap B, havinginternal chamber,

B, the pivot-supporting spider with annular plate K, substantially as set forth.

4. The combination, with the revoluble heads or carrier-plates H and I, supporting the piston D and bulk-head E, and provided with pivots or journals H I, of the yoke I? and adjusting studs or screws J and T, or either of them, for the purpose set forth.

5. The combination, with the base piece 0, having central circular recess, annular chambers s and Z, and passages a a, of the pistoncarrying plate I, provided with central axial pivot, I, and openings m a n, and havingupper and lower bearing-surfaces fitting the re cess of the base, as at 0 and h, substantially as and for the purpose set forth.

W'itness our hands this 25th day of Novemher, A D. 1882.

BENAIAH FITTS. JAMES F. wrrson. 

